zkMe vs Opacity
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
zkMe
This app uses zero-knowledge technology to verify credentials without revealing personal information. It allows users to prove eligibility for services by answering yes/no questions about their data, ensuring privacy and control.
- Zero-knowledge credential verification
- Decentralized and private-by-design
- Proves eligibility without disclosing PII
- Self-sovereign data control
- Generates mathematical zero-knowledge proofs
- Verifies age without revealing birthday
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———— You, privately verified ———— zkMe verifies user credentials without disclosing any personal information to anyone! Through the use of innovative zero-knowledge technologies, it is the only KYC solution to be fully decentralized, private-by-design and compliant with global AML requirements. ———— Why is zkMe the ultimate tool to protect your privacy? ———— Unlike other eVerification solutions, the zkMe app actually does not share any personal identifiable information (PII) to anyone. By generating mathematical zero-knowledge proofs of knowledge (ZKP), the zkMe app only discloses yes/no answers to a list of predetermined eligibility questions on your credentials. For example, by using the zkMe app, you can prove you are over 18, without disclosing your actual birthday. ———— zkMe got you covered ———— Shield your Privacy - No credential verified through the zkMe app is stored on any centralized storage, making it virtually impossible for any private data leak. The only thing shared (if authorized by you) are yes/no answers to basic eligibility questions such as "are you over 18 years old?". Be Self-Sovereign - The zkMe app puts you in control of any and all sharing of your data, even if that data is anonymized through the use of zero-knowledge. You see and control which proofs have been generated and are active, which chain ecosystems these proofs are being used in and which applications have authorization to verify your eligibility. 3 easy steps to protect your identity online: - Verify credentials and generate ZK proofs - Connect your proofs to the ecosystems you are active in - Authorize the services you want to present proofs to Download the zkMe app to get your journey started today.
Opacity
Securely store and manage your digital identity, including logins and credentials. Prove facts about yourself without revealing sensitive data, and share verified information with full transparency. Maintain control over your online presence and reputation.
- Private, verified identity vault
- Store logins and credentials
- Prove identity facts without data exposure
- Share verified information transparently
- Connect and manage accounts
- Build online reputation
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Opacity is your passport to a user-owned internet. Store your digital identity — logins, credentials, and connected accounts — in a private, verified vault that only you control. Prove facts about your identity without exposing your data. Opacity lets you verify who you are and what you’ve done while keeping your information private and secure. Share what you want — instantly, with full transparency into what’s being shared and with whom. You stay in control, whether you’re connecting accounts, proving your credentials, or porting your reputation across the internet. How it works: • Add accounts like GitHub, Spotify, and more • Verify data (e.g. commit history, top 1% listener) • Share proof anywhere — no need to reveal your full profile Own your identity. Build your reputation. Stay private.
Screenshots
Verdict
The clearest difference is rating: Opacity at 5.0 against zkMe's 3.4. zkMe's advantage is iOS requirement (15 vs 17.0). On price, ratings volume, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Opacity holds the better App Store score, 5.0 against 3.4. Both are backed by a comparable volume of ratings — 5 and 3 respectively.
Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 5, 2026 and October 3, 2026 respectively.
| Parameter | zkMe | Opacity |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (5 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 5 — better | 3 |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15 — better | 17.0 |
| Further details — not scored | ||
| Size | 211 MB | 74 MB |
| Age rating | 17+ | 4+ |
| Developer | zkMe Technology Limited | Opacity Labs |
Customer experience
zkMe
Opacity
In-app purchases
zkMe
No in-app purchases
Opacity
No in-app purchases









